DE10328072B4 - Method of fabricating semiconductor devices as stacked multiple gates - Google Patents
Method of fabricating semiconductor devices as stacked multiple gates Download PDFInfo
- Publication number
- DE10328072B4 DE10328072B4 DE2003128072 DE10328072A DE10328072B4 DE 10328072 B4 DE10328072 B4 DE 10328072B4 DE 2003128072 DE2003128072 DE 2003128072 DE 10328072 A DE10328072 A DE 10328072A DE 10328072 B4 DE10328072 B4 DE 10328072B4
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- Prior art keywords
- electrically conductive
- contact hole
- conductive layers
- contact
- layers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body
- H01L27/06—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including a plurality of individual components in a non-repetitive configuration
- H01L27/0688—Integrated circuits having a three-dimensional layout
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body
- H01L27/10—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including a plurality of individual components in a repetitive configuration
- H01L27/118—Masterslice integrated circuits
- H01L27/11803—Masterslice integrated circuits using field effect technology
Abstract
Verfahren
zur Herstellung eines Halbleiterbauelementes als Stacked-Mehrfach-Gatter,
bei dem
in einem ersten Schritt in einem Halbleitersubstrat
(1) eine dotierte Wanne (10) mit einer für einen Kontaktbereich vorgesehenen
Dotierstoffkonzentration hergestellt wird,
in einem zweiten
Schritt eine alternierende Schichtfolge aus dielektrischen Schichten
(2, 20, 21, 22) und elektrisch leitfähigen Schichten (3, 30, 31)
zur Bildung von Gate-Elektroden aufgebracht wird,
in einem
dritten Schritt in der Schichtfolge ein bis auf die dotierte Wanne
(10) reichendes Kontaktloch (4) ausgeätzt wird, wobei die Ätzung so
vorgenommen wird, dass an das Kontaktloch (4) angrenzende Anteile
der elektrisch leitfähigen
Schichten (3, 30, 31) oxidiert und elektrisch isolierend gemacht
werden, um Gate-Oxide zu bilden,
in einem vierten Schritt in
das Kontaktloch (4) ein Nano-Material
zur Bildung von Kanalbereichen eingebracht wird, das eine Materialstruktur
aus Si-Nanodrähten
aufweist, und
in einem fünften
Schritt eine oberseitige weitere elektrisch leitfähige Schicht
(7) aufgebracht wird, die als Anschlusskontakt...A method of manufacturing a semiconductor device as a stacked multiple gate, in which
in a first step, in a semiconductor substrate (1), a doped well (10) having a dopant concentration provided for a contact region is produced,
in a second step, an alternating layer sequence of dielectric layers (2, 20, 21, 22) and electrically conductive layers (3, 30, 31) is applied to form gate electrodes,
in a third step in the layer sequence, a contact hole 4 extending down to the doped well 10 is etched out, wherein the etching is carried out such that portions of the electrically conductive layers (3, 30, 31) adjoining the contact hole (4) are etched ) are oxidized and made electrically insulating to form gate oxides,
in a fourth step in the contact hole (4) is introduced a nano-material for forming channel regions, which has a material structure of Si nanowires, and
in a fifth step, a top-side further electrically conductive layer (7) is applied, which can be used as a connection contact ...
Description
Verfahren zur Herstellung von Halbleiterbauelementen als Stacked-Mehrfach-Gattermethod for the production of semiconductor devices as stacked multiple gates
Logische Gatter können dadurch gebildet werden, dass mehrere Transistoren in Reihe hintereinander geschaltet werden, so dass zwischen den äußersten Source-/Drain-Bereichen eine Mehrzahl von über Gate-Elektroden angesteuerten Kanalbereichen angeordnet ist, die somit in Serie hintereinander geschaltet sind. Es müssen daher alle Transistoren offen sein, um einen Stromfluss von Source nach Drain zu ermöglichen. Die logische Verknüpfung ist daher zwischen einer Mehrzahl von Eingangssignalen gleichzeitig realisiert.logical Gates can be formed by multiple transistors in series one behind the other be switched so that between the outermost source / drain regions a plurality of over Gate electrode driven channel regions is arranged, the thus connected in series in series. It must therefore all transistors should be open to drain current from source to enable. The logical link is therefore between a plurality of input signals simultaneously realized.
Eine derartige Schaltungsanordnung beansprucht einen erheblichen Platzbedarf auf der Oberseite eines Halbleiterchips. Dreidimensionale Anordnungen der Transistoren für eine derartige Schaltungsanordnung in so genannter kubischer oder vertikaler Integration (Sandwich), bei denen die Längsrichtung der Transistoren senkrecht zur Oberseite eines Halbleiterchips verläuft, sind nur durch aufwendige Prozessschritte herstellbar.A Such circuitry requires a considerable amount of space on top of a semiconductor chip. Three-dimensional arrangements the transistors for Such a circuit arrangement in so-called cubic or vertical integration (sandwich), where the longitudinal direction the transistors are perpendicular to the top of a semiconductor chip, are can only be produced by complex process steps.
Seit einiger Zeit werden im Bereich der Halbleitertechnologie Materialstrukturen im Nanometer-Bereich als so genannte Carbon-Nanotubes oder Silizium-Nanowires hergestellt. Mit derartigen Materialstrukturen lassen sich bei geeigneter Anordnung Bauelemente äußerst geringer Dimension herstellen.since For some time, material structures have become in the field of semiconductor technology in the nanometer range as so-called carbon nanotubes or silicon nanowires produced. With such material structures can be in a suitable Arrangement components extremely low Create dimension.
In
der
In
der
In
der
Aufgabe der vorliegenden Erfindung ist es, ein einfaches Herstellungsverfahren für Bauelementstrukturen als Mehrfach-Gatter anzugeben, die einen möglichst geringen Oberflächenanteil eines Halbleiterchips beanspruchen.task The present invention is a simple manufacturing process for component structures as a multiple gate indicate the one as possible low surface area claim a semiconductor chip.
Diese Aufgabe wird mit dem Verfahren zur Herstellung eines Halbleiterbauelementes mit den Merkmalen des Anspruches 1 gelöst. Ausgestaltungen ergeben sich aus den abhängigen Ansprüchen.These Task is with the method for producing a semiconductor device solved with the features of claim 1. Embodiments result from the dependent ones Claims.
Bei dem herzustellenden Halbleiterbauelement ist in einem Halbleitersubstrat eine als Kontaktbereich vorgesehene dotierte Wanne ausgebildet, über der sich eine Schichtfolge befindet, die alternierend dielektrische Schichten und elektrisch leitfähige Schichten umfasst. In dieser Schichtfolge befindet sich eine vertikale Kontaktlochfüllung, die bis auf die dotierte Wanne herabreicht und ein elektrisch leitfähiges Material ist, das eine Materialstruktur mit Si-Nanodrähten aufweist und das für die Transistorkanäle vorgesehen ist. Zwischen dieser Kontaktlochfüllung und den elektrisch leitfähigen Schichten ist jeweils eine schmale Zone eines elektrisch isolierenden Materials vorhanden, das während des Ätzens des Kontaktloches durch eine Oxidation des elektrisch leitfähigen Materiales hergestellt ist. Auf der Oberseite befindet sich eine weitere Schicht aus elektrisch leitfähigem Material, die mit der Kontaktlochfüllung, vorzugsweise durch direkten Kontakt, elektrisch leitend verbunden ist und als oberer Anschlusskontakt vorgesehen ist.at The semiconductor device to be produced is in a semiconductor substrate a doped well designed as a contact region is formed above the there is a layer sequence, the alternating dielectric Layers and electrically conductive layers includes. In this layer sequence is a vertical contact hole filling, the reaches down to the doped well and an electrically conductive material is that has a material structure with Si nanowires and provided for the transistor channels is. Between this contact hole filling and the electrically conductive layers is in each case a narrow zone of an electrically insulating material available that during of the etching the contact hole by an oxidation of the electrically conductive material is made. On the top is another layer made of electrically conductive Material with the contact hole filling, preferably by direct Contact, electrically connected and as the upper terminal contact is provided.
Die die Kontaktlochfüllung bildenden Nano-Materialien sind Silizium-Nanowires (Silizium-Nanodrähte). Die Kontaktlochfüllung bildet die Kanalbereiche der Transistoren in vertikaler Richtung bezüglich der Oberseite des Substrates.The the contact hole filling forming nano-materials are silicon nanowires (silicon nanowires). The Contact hole filling forms the channel regions of the transistors in the vertical direction in terms of the top of the substrate.
Die dotierte Wanne in dem Halbleitersubstrat als unterer Kontaktbereich und die obere elektrisch leitfähige Schicht als oberer Anschlusskontakt sind über die Kanalbereiche der Transistoren in der Kontaktlochfüllung elektrisch miteinander verbunden. Je nach Anordnung beziehungsweise Kontaktierung der jeweiligen Gate-Elektroden, die durch die elektrisch leitfähigen Schichten gebildet werden, mit anderen Gate-Elektroden oder Kontaktanschlüssen las sen sich logische Gatter (zum Beispiel UND, ODER) realisieren. Die elektrisch leitfähigen Schichten können insbesondere Aluminium sein, das angrenzend an die Kontaktlochfüllung bei der Ätzung des Kontaktloches zu Aluminiumoxid (Al2O3) oxidiert wurde. Das Aluminiumoxid bildet die Gate-Oxide.The doped well in the semiconductor substrate as the lower contact region and the upper electrically conductive layer as the upper connection contact are electrically connected to one another via the channel regions of the transistors in the contact hole filling. Depending on the arrangement or contacting of the respective gate electrodes, which are formed by the electrically conductive layers, with other gate electrodes or contact terminals read sen logic gates (for example, AND, OR) realize. The electrically conductive layers may in particular be aluminum, which has been oxidized adjacent to the contact hole filling during the etching of the contact hole to aluminum oxide (Al 2 O 3 ). The alumina forms the gate oxides.
Es
folgt eine genauere Beschreibung von Beispielen des Herstellungsverfahrens
anhand der
Die
Die
Die
Die
Die
Die
Die
Die
Die erfindungsgemäß hergestellte Anordnung ist äußerst platzsparend. Vertikale Anordnungen von Transistoren um jeweilige Kontaktlochfüllungen herum können auf demselben Halbleiterchip mehrfach vorgesehen werden. Dazu werden gleichzeitig mehrere Kontaktlöcher ausgeätzt. Auch die Kontaktlochfüllungen können in mehrere Kontaktlöcher gleichzeitig in demselben Herstellungsschritt eingebracht werden. Es ist so möglich, eine Mehrzahl von Mehrfach-Gattern auf kleinster Fläche unterzubringen.The produced according to the invention Arrangement is extremely space-saving. Vertical arrangements of transistors around respective contact hole fills around be provided several times on the same semiconductor chip. To do this at the same time several contact holes etched. Also the contact hole fillings can in several contact holes be introduced simultaneously in the same manufacturing step. It is possible accommodate a plurality of multiple gates in the smallest area.
Das
Halbleiterbauelement gemäß
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003128072 DE10328072B4 (en) | 2003-06-23 | 2003-06-23 | Method of fabricating semiconductor devices as stacked multiple gates |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003128072 DE10328072B4 (en) | 2003-06-23 | 2003-06-23 | Method of fabricating semiconductor devices as stacked multiple gates |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10328072A1 DE10328072A1 (en) | 2005-01-20 |
DE10328072B4 true DE10328072B4 (en) | 2007-03-15 |
Family
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DE2003128072 Expired - Fee Related DE10328072B4 (en) | 2003-06-23 | 2003-06-23 | Method of fabricating semiconductor devices as stacked multiple gates |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5612563A (en) * | 1992-03-02 | 1997-03-18 | Motorola Inc. | Vertically stacked vertical transistors used to form vertical logic gate structures |
US6197641B1 (en) * | 1998-08-28 | 2001-03-06 | Lucent Technologies Inc. | Process for fabricating vertical transistors |
US6515325B1 (en) * | 2002-03-06 | 2003-02-04 | Micron Technology, Inc. | Nanotube semiconductor devices and methods for making the same |
-
2003
- 2003-06-23 DE DE2003128072 patent/DE10328072B4/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5612563A (en) * | 1992-03-02 | 1997-03-18 | Motorola Inc. | Vertically stacked vertical transistors used to form vertical logic gate structures |
US6197641B1 (en) * | 1998-08-28 | 2001-03-06 | Lucent Technologies Inc. | Process for fabricating vertical transistors |
US6515325B1 (en) * | 2002-03-06 | 2003-02-04 | Micron Technology, Inc. | Nanotube semiconductor devices and methods for making the same |
Non-Patent Citations (1)
Title |
---|
M.R.C. Hunt u.a.: "Thermally induced de composi- tion..." in Appl. Phys. Lett., 2002, Vol. 81, S. 4847-4849 * |
Also Published As
Publication number | Publication date |
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DE10328072A1 (en) | 2005-01-20 |
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ON | Later submitted papers | ||
OP8 | Request for examination as to paragraph 44 patent law | ||
8125 | Change of the main classification |
Ipc: H01L 21/8234 AFI20051017BHDE |
|
8364 | No opposition during term of opposition | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |